Mobile battery charger



FIG. 1 is a front view of the mobile battery charger;

FIG. 2 is a left-hand-side view of the mobile battery charger;

FIG. 3 is a right-hand-side view of the mobile battery charger;

FIG. 4 is a rear view of the mobile battery charger;

FIG. 5 is a top view of the mobile battery charger; and,

FIG. 6 is a bottom view of the mobile battery charger.

The portions in broken lines in the drawings are shown to illustrate environment only and form no part of the claimed design. 

CLAIM The ornamental design for a mobile battery charger, as shown and described in the Figures. 